Electric clock



Sept. 6', 1932.

J. R. PUTNAM 1,876,020

ELECTRIC CLOCK Fil ed Sept. 26, 1950 J .13 ha Z7 mats se ta, 1932 UNITEDSTATES PATENT OFFICE 34m 2. PUTNAI, OF WATEBIBUBY, CONNIX'JTIC'UT,ASSIGNOB TO WA'IEBBURY CLOCK OOKPANY, OI WATEBBUBY, CONNECTICUT, ACORPORATION ILECTBIC CLOCK Application illed September 28, 1930. SerialFo. 484,477.

My invention relates to an improvement in electric clocks, the objectbeing to simplify and cheapen the construction of the'same.

With these ends in view, my invention consists in an electric clockhaving certain details of construction as will be hereinafter .shown anddescribed, the dominant structural feature of my improvement being theelimination of the rear plate commonly used in clock movements.

In the accompanying drawing:

. Fig. 1 is a-v1ew in front elevation of an electric clock movementconstructed in accordance with my invention;

Fig. 2 is a side view thereof with a portion of the motor in section toshow the mode of mounting it in my improved motor-support, so as to beunitary therewith;

Fig. 3 is a rear view of the movement;

Fig. 4 is a lan view thereof; and

Fig. 5 is a etached perspective view showing the mode of applying myimproved motor-support to the front movement plate.

In carrying out my invention as herein shown, I employ a front movementplate'10 and in lieu of the ordinary complimentary rear movement plate,a one-piece sheet-metal motor-sup ort 11 provided with a pair ofcorrespon ng mounting-arms 12 extending forward from it at a right an leto its respective edges and furnished at t eir forward ends withoutwardly-turned perforated fastening-lugs 13 by which they are firmlysecured by screws 14 to the back of the plate upon which themotor-support is .thus firmly mounted, the motor-sup rt being thusremovably secured directly to t e "front movement-plate.

The motor-support as thus constructed, provides for the sole support ofan electric motor having self-contained bearin I and interposed betweenthe rear face of t c said front plate 10 and the forward face of thesaid motor-support 11 and small enough in diameter to be installedbetween the forwardly-projecting mounting-arms 12-12 thereof. To thisend the said support is formed with a mounting-opening 15 in which the"shouldered rear end 16 of the core 17 of the motor is swaged, wherebythe motor is carried b the support and by it alone. The motor and itssupport thus form a unit and as a unit are applied to and removed fromthe movement-plate 10. The motor itself may be of any approvedconstruction, so long as 5 it has self-contained bearings in the sensethat its shaft 23 requiresno end-bearings external to the motor itself;As shown, it consists of a field-casing 18 having a plu- 4 rality ofpole-fingers 19 and a companion e0 field-casing 20. Upon the said core-17 is wound a coil of high-resistance fine wire 21 inter osedbetweenthe field-casings 18 and 20 a oresaid. The said casings 18 and20, the coil 21'and the core 17 form the stator of the motor. Within thecore are bushings 22 providing bearings for the motor-shaft 23 andconfining a lubricant 24 between them. At its projecting rear end thesaid shaft 23 is furnished with a starting-button 25 and near itsforward end with a rotor 26 mounted on a collar 27 staked upon the saidshaft 23 which is furnished at its extreme forward end with a pinion 28meshing into the first wheel 29 of the movement tram. .Under thisconstruction the motor is irremovably' attached to the said support,with its bearings located within the core of the stator.

The said wheel 29 carries a pinion 30 turning loosely upon a spindle 31,the rear end 8 of which is journalled in and supported by a lugs 32centrally depending from the bridge 11, while its forward end carriesthe sweepsecond-hand 32". The said spindle 31 supports and turns withina sleeve 33 carrying the minute-hand 34 and has bearing in a hole 35 inthe front plate 10. J

The pinion 30 aforesaid meshes into the second wheel 36 of" the trainand is carried by a pinion 37 turning loosely--upon a stud 38 riveted ina hole 39 in the front movement plate 10. I

The pinion 37 in turn meshes into the third wheel 40 of the clock trainwhich wheel 40 is carried by a pinion 41 staked upon the spindle 31aforesaid.

The pinion 41 in turn meshes intov the fourth wheel 42 of the movementtrain, the said wheel 42 being carried by a pinion 43 turning looselyupon the stud 38 before mentioned.

The pinion 43 meshes into the fifth wheel 44 of the movement train, thiswheel being mounted upon the sleeve 33 which mounts a cannon-pinion 45located in front of the front movement plate 10 and meshing into aminute-wheel 46 turning on a stud 47 riveted in a hole 48 in the frontmovement plate 10.

The pinion 49 of the minute-wheel 46 meshes into an hour-wheel 50mounted upon an hour-hand socket 51 which turns upon the sleeve 33aforesaid and carries the hour-hand By providing the motor-support 11 asdescribed for the carriage of the motor and also for furnishing asupport and bearing for the rear end of the spindle 31 of the movementtrain and by further mounting the second and fourth wheels 36 and 42 ofthe movement-train upon a single stud 38, riveted in the front movementplate, I am enabled to dispense with the rear movement plate commonlyused, and so effect a very substantial economy of material and labor inthe construction of such clock movements, saving not only sheet-metalstock, but also the several pinion staifs generally employed formounting the wheels of a movement train, these stafl's being commonlyjournalled at their respective ends in complimentary front and rearmovement plates. I

I claim:

1. An electric clock-movement having a front movement-plate, a one-piecemotorsupport removably secured directly thereto, a motor irremovablattached to the said motor-support, forming a unit therewith and havingits bearings located within the core of its stator; and a movement-traingeared into the rotor of the motor.

2. An electric clock-movement having a front movement-plate, a one-piecemotorsupport removably secured directly thereto, a motor irremovablattached to the said motor-support, forming a unit therewith and havingits bearings located within the core of its stator, a sweep-secondspindle journaled at its rear end in said motor-support and alsosupported by the front movement-plate; and a movement-train connectedwith the rotor of the motor and in part supported by the said spindle.

3. An electric clock-movement having a front movement-plate, amotor-support removably secured directly thereto, a motor irremovablyattached to the said motor-support, forming a unit therewith and havingits bearings located within the core of its stator, a movement-traindriven by the rotor of the motor, and a stud mounted in the said frontmovement-plate and extending rearwardly therefrom, the second and fourthwheels of the said train being, with their pinions,

sleevedover the said stud by which they are carried and on which theyturn.

4. An electric clock-movement having a front movement-plate, a one-piecemotorsupport removably secured directly thereto, a motor irremovablyattached to the said motor-support, forming a unit therewith and havingits bearings located within the core of its stator, and a movement-traindriven by the rotor of the motor and having running parts supported bythe said plate and by the said motor-support.

5. An electrlc clock-movement having a front movement-plate, a one-piecemotor-support removably secured directly thereto, a motor irremovablyattached to the said motor-support, forming a unit therewith and havingits bearings located within the core of its stator, a sweep-secondspindle supported at its rear end in the said motor-support, a studcarried by the said front movementplate and extending rearwardlytherefrom, and a movement tra'in driven by the runnin of the motor andincluding elements mounted upon the said spindle and upon the said stud.

In testimony whereof, I have signed this specification.

JAMES R. PUTNAM.

